use Win32::OLE ('in');

...

@host = ($server,"Root/default",$user,$password);
$localWMI = Win32::OLE->new('WbemScripting.SWbemLocator'); 
$WMI = $localWMI->ConnectServer(@host); 

$registry = $WMI->Get("StdRegProv") or die "Failed to get registry.";

$strPath='SYSTEM\CurrentControlSet\Control\ComputerName\ComputerName';
$strValue = "ComputerName";
print $strPath;
$return=$registry->GetStringValue(
2147483650, $strPath, $strValue, $result
);
print "\n$strValue:($return,$result)\n";

my $err = Win32::OLE->LastError();
if ($err == 0) {print "Successful!\n";}
else {print $err;}